﻿using System;
using System.Collections.Generic;
//using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Data;

namespace WpfTrainingApp
{
    [ValueConversion(typeof(bool), typeof(Visibility))]
    public class BoolToVisibilityConverter : IValueConverter
    {

        #region IValueConverter Members
        /// <summary>
        /// Converts a value.
        /// </summary>
        /// <param name="value">The value produced by the binding source.</param>
        /// <param name="targetType">The type of the binding target property.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value is bool && targetType == typeof(Visibility))
            {
                bool val = (bool)value;
                if (val)
                    return Visibility.Visible;
                else
                    if (parameter != null && parameter is Visibility)
                        return parameter;
                    else
                        return Visibility.Collapsed;
            }
            throw new ArgumentException("Invalid argument/return type. Expected argument: bool and return type: Visibility");
        }

        /// <summary>
        /// Converts a value.
        /// </summary>
        /// <param name="value">The value that is produced by the binding target.</param>
        /// <param name="targetType">The type to convert to.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value is Visibility && targetType == typeof(bool))
            {
                Visibility val = (Visibility)value;
                if (val == Visibility.Visible)
                    return true;
                else
                    return false;
            }
            throw new ArgumentException("Invalid argument/return type. Expected argument: Visibility and return type: bool");
        }
        #endregion
    }

}
